Electronic gearing


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  1. #1
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    Default Electronic gearing

    Does the open source firmware have the capability/possibility to implement an electronic gearing function? I want to create an electronic leadscrew for my lathe and it would be nice if I could get the drive to do the heavy lifting, and just have to create some kind of simple interface to program it.

    Brian

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    Default Re: Electronic gearing

    I have looked through some of the code, and it appears this would be possible. Is the latest open source code available on GitHub? GitHub has v1.006, and the Granite Devices talks about v2.0. Is 2.0 the motor control firmware, or the front end firmware?

    Brian



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    Community Moderator Al_The_Man's Avatar
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    Default Re: Electronic gearing

    The CNC servo controllers have to be under the control of a single controller not individual drives controlled separately as in Mach.
    IOW the PID loop/encoders have to return to the single controller in order to gear one encoder off another in master/slave mode.
    I believe Dynomotion/Kflop will do it.
    Al..

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


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    Default Re: Electronic gearing

    Al,

    I'm not sure your familer with my intended usage. This would be for a manual lathe, but instead of a mechanical gearbox linking the lead screw to the spindle, it would be done electronically via a spindle encoder and a servo driving the leadscrew. There is no need for a central motion controller, as there is only one servo.

    The Argon drive Guidebook says it supports quadrature input as a means of set point input. This is half the battle, and the only thing left to create is a scaler between the quadrature input and the drive command.

    Some servo drives already incorporate this functionality already, so, it's nothing new. What is so exciting about the Argon is the possibility of adding lathe leadscrew specific functionality.

    Brian



  5. #5
    Community Moderator Al_The_Man's Avatar
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    Default Re: Electronic gearing

    I see, this appears to be a different application that the one I am accustomed to using Galil cards etc.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


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